USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Aquatic and Wetland Vascular Plants of the Northern Great Plains

62. Cyperaceae, the Sedge Family

2. Carex L. -- Sedge

51. Carex sychnocephala Carey

Tufted from fibrous roots (often acting as an annual); culms often numerous and crowded, obtusely trigonous, 0.5-6 dm long. Leaves 1.5-4 mm wide; sheaths tight, white-hyaline ventrally. Spikes bisexual, gynaecandrous, densely aggregate in ovoid heads 1.5-3 cm long; bracts leaflike, 2-4 per head, the longest ones many times longer than the heads; pistillate scales hyaline with a green midvein, acuminate or cuspidate, mostly 2/3 as long as the perigynia. Perigynia green to stramineous, flat, scale-like, lanceolate, 5-6.5 mm long, 1/6 as wide, slightly nerved dorsally and ventrally, narrowly wing-margined to the base, spongy below the achene at maturity, tapering or contracted to the slender, serrulate beak which is 3-4.5 mm long, slenderly bidentate; achenes lenticular, 1-1.5 mm long; stigmas 2. Jun--Sep. Wet meadows, shores, mud flats and stream banks; occasional from n and e ND to e SD; (NY and Ont. to Alta., s to WI, IA, SD and MT).
GIF- Species Photo/Drawing
GIF- Distribution Map

Map key

Carex sychnocephala (from Hermann 1970).  

Previous Section -- Carex stricta Lam.
Return to Family -- Cyperaceae - The Sedge Family
Next Section -- Carex tenera Dewey

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 06:41:57 EST
Sioux Falls, SD [sdww54]